Just after vertical launch from earth surface, the space shuttle takes 8.0 s to reach a speed of 160 km/h. during this phase, what is the apparent weight of an 84 kg astronaut?

1291.08 N

Explanation:

acceleration=change in speed per unit time

where v and u are final and initial velocities respectively.

u is zero and v=160 km/h converted to m/s becomes

acceleration=

Apparent weight,

Taking g as 9.81 and m as 84 Kg then

answer; i believe that the correct answer is (d) a very small amount of mass

well, you would divide 135 by 33 to get your answer. then that is how many seconds it would take. boardman should fly about 132 m or 4.090909090909091 seconds.